They always focus on improving user retention by enhancing email open rates, AB testing the new mail types, and other changes. Our teams' communication is flawless and regular. Sendios is always ready to help us "put out fires" fast that often happen in each startup's life :D

I like how the templates are organized. It's easy to find needed template using tags. Sendios has lots of campaign setup options. The segmentation can be really precise if you import enough user data.